var $ano = $(".ano");
$ano.velocity({
    "margin-left":"+=500px"
}, { 
    /* Log all the animated divs. */
    duration: "2000",
    loop:true,
    complete: function(elements) { console.log(elements); }
}).velocity({
    "margin-left":"-=500px"
}, { 
    /* Log all the animated divs. */
    loop:true,
    duration: "2000",
    complete: function(elements) { console.log(elements); }
});

$ano.on("change", function(){
	console.log("test width:"+$(this).width());
})